A friction charge-providing member for positively-chargeable toner is disclosed, which comprises a parent material having provided at least on the surface thereon a compound represented by formula (I) as a charge-controlling agent: ##STR1## wherein A and A' may be the same or different and each independently represents a hydrogen atom, a halogen atom, a nitro group, an alkyl group having 1 to 18 carbon atoms which may contain a substituent(s), an alkenyl group, an acyl group, a sulfonic acid group, a sulfamoyl group, a N-substituted sulfamoyl group, an alkylsulfonyl group having 1 to 5 carbon atoms, a carboxyl group, an alkylester group having 1 to 5 carbon atoms, a hydroxyl group, an alkoxyl group having 1 to 18 carbon atoms, an amino group, and a N-substituted amino group; B and B' may be the same or different and each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms which may contain a substituent(s), an alkenyl group, an amino group, a N-substituted amino group, an acyl group, a benzoylamino group which may contain a substituent(s), a sulfamoyl group, an alkylester group having 1 to 5 carbon atoms, a hydroxyl group, an alkoxyl group having 1 to 18 carbon atoms and a N-substituted carbamoyl group; X, X' Y and Y' may be the same or different and each independently presents --O--, --COO--, --NH-- and --S-- and is present at ortho-position of an azo group; n, n', m and m' may be the same or different and each independently represents an integer of 1 to 4; Z represents a hydrogen atom, sodium, potassium, ammonium, aliphatic ammonium, alicyclic ammonium and heterocyclic ammonium; M represents chromium, cobalt and iron.